Make EBorderStyle an enum class.

third_party/WebKit/Source/core/style/StyleMultiColData.h

Index: third_party/WebKit/Source/core/style/StyleMultiColData.h
diff --git a/third_party/WebKit/Source/core/style/StyleMultiColData.h b/third_party/WebKit/Source/core/style/StyleMultiColData.h
index 96c5f536544efa1c07135e646f0bc0384612e6e3..bc9d257a5b0a2fc790ed52329f50e0c7482078bf 100644
--- a/third_party/WebKit/Source/core/style/StyleMultiColData.h
+++ b/third_party/WebKit/Source/core/style/StyleMultiColData.h
@@ -48,8 +48,8 @@ class CORE_EXPORT StyleMultiColData : public RefCounted<StyleMultiColData> {
   bool operator!=(const StyleMultiColData& o) const { return !(*this == o); }
 
   unsigned short RuleWidth() const {
-    if (rule_.Style() == kBorderStyleNone ||
-        rule_.Style() == kBorderStyleHidden)
+    if (rule_.Style() == EBorderStyle::kNone ||
+        rule_.Style() == EBorderStyle::kHidden)
       return 0;
     return rule_.Width();
   }